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Where should you store levothyroxine?

Anastasia in ThyForLife team

By Anastasiia Petrenko

Where should you store levothyroxine

Did you ever have a feeling that your body becomes resistant to levothyroxine, and you get worse over time? Do not rush to conclusions – the reason behind this change may be not the prescribed dose but improper levothyroxine storage conditions, which change the tablet’s effect.

Levothyroxine storage

Even though many of us have a “medicine cabinet” in the bathroom, it does not mean that it is a good idea to store your medications there. Three main reasons why the bathroom is not safe for your tablets are:

  1. It is humid.
  2. It is hot.
  3. It is lighter than it should be.

In 2017, a group of Italian researchers conducted an experiment to observe patients with hypothyroidism whose TSH levels stayed outside the normal range despite taking levothyroxine regularly. These patients stored their tablets in the wrong places — next to heaters, near the shower in the bathroom, or by the window. When they changed the medication storage conditions and moved it away from heat, light, and humidity, their symptoms were reduced.

Even though this research had very few observed patients and requires further follow-ups, it totally makes sense as a rare bathroom fits the storage conditions necessary for any medication. Recent guidelines recommend levothyroxine storage per product at 20–25°C (68–77°F) and protected from light and moisture. You may experiment and measure these parameters in your bathroom after taking a morning shower or evening bath.

Thus, it is a good idea to move all tablets out of the bathroom. It may be convenient to have separate storage in the kitchen or other room, which should be far from children’s and pet’s sight.

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